APA (7th ed.) Citation

Cowley & Parker. (2001). The reader's companion to military history. Houghton Mifflin Company.

Chicago Style (17th ed.) Citation

Cowley and Parker. The Reader's Companion to Military History. Boston: Houghton Mifflin Company, 2001.

MLA (8th ed.) Citation

Cowley and Parker. The Reader's Companion to Military History. Houghton Mifflin Company, 2001.